<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise 自定义</title>
    <script src="./Promise.js"></script>
</head>
<body>
    <script>
        //1. 实例化对象
        let p = new Promise((resolve, reject) => {
            // reject('error');
            resolve('OK');
        });

        //异常穿透
        p.then(
            v => {
                console.log(v);
            }
        ).catch(
            r => {
                console.log(r);
            }
        )

        //值传递
        p.catch(
            r => {
                console.log(r);
            }
        ).then(
            v => {
                console.log(v);
            }
        )


        


    </script>
</body>
</html>